Comprehensive DescriptionRead full entry
Plants perennial. Rhizome ca. 8 mm in diam. Stems 20-40 cm tall, usually branched from base, glabrous, basally with membranous scales. Stem leaves with petiole to 7 cm basally on stem, shortly petiolate or sessile toward stem apex; leaf blade pentagonal to triangular-ovate, 3.5-9 cm long, 3.5-10 cm wide, 3-sect, glabrous; leaflets 2 times pinnately divided; ultimate segments narrowly ovate to lanceolate, margin toothed and teeth acute. Flowers 1.8-2.8 cm in diameter. Sepals 5-7, elliptic, 5-8 mm, glabrous, rarely ciliate. Petals 7-14, white, sometimes tinged with purple, obovate-oblong to oblong, 1-1.4 cm, apex rounded to ± acute. Stamens as long as sepals. Ovary sparsely puberulous. Styles very short; stigma globose. Achenes obovoid, 3-4 mm, sparsely pubescent.